package com.example.yls.wuziqi;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by yls on 2018/6/13.
 */

public class wuziPanel extends View {
    private int panelWidth;
    private float itemSize;
    private static  final  int MAX_ITEMS=10;
    private int MAX_COUNT_IN_LINE = 5;
    private Paint paint;

    private Bitmap mWhitePiece;
    private Bitmap mBlackPiece;

    private float ratioPieceOfLineHigh = 3 * 1.0f / 4;

    private boolean mIsWhite = true;//白棋先走或轮到白棋
    private ArrayList<Point> mWhiteArray = new ArrayList<>();
    private ArrayList<Point> mBlackArray = new ArrayList<>();

    private boolean mIsGameOver;
    private boolean mIsWhiteWinner;
    public wuziPanel(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        setBackgroundColor(0x44FF0000);
        paint = new Paint();
        paint.setColor(Color.BLACK);
        paint.setAntiAlias(true);
        paint.setDither(true);
        paint.setStyle(Paint.Style.STROKE);

        mWhitePiece = BitmapFactory.decodeResource(getResources(),R.drawable.stone_w2);
        mBlackPiece = BitmapFactory.decodeResource(getResources(),R.drawable.stone_b1);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        int width=MeasureSpec.getSize(widthMeasureSpec);
        int height=MeasureSpec.getSize(heightMeasureSpec);
        int redult=Math.min(width,height);
        setMeasuredDimension(redult,redult);
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        Log.e("wuziPanel","onSizeChanged w");
        panelWidth = w;
         itemSize = panelWidth * 1.0f / MAX_ITEMS;

        int pieceWidth = (int)(itemSize * ratioPieceOfLineHigh);
        mWhitePiece = Bitmap.createScaledBitmap(mWhitePiece,pieceWidth,pieceWidth,false);
        mBlackPiece = Bitmap.createScaledBitmap(mBlackPiece,pieceWidth,pieceWidth,false);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if(mIsGameOver) return false;
        int action = event.getAction();
        if(action == MotionEvent.ACTION_UP){
            int x = (int) event.getX();
            int y = (int) event.getY();
            Point p = getValidPoint(x,y);
            if(mWhiteArray.contains(p) || mBlackArray.contains(p)){
                return false;
            }

            if(mIsWhite){
                mWhiteArray.add(p);
            }else{
                mBlackArray.add(p);
            }
            invalidate();
            mIsWhite = !mIsWhite;
            return true;
        }
        return true;
    }

    private Point getValidPoint(int x, int y) {
        return new Point((int)(x / itemSize),(int)(y / itemSize));
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        drawBoard(canvas);
        drawPieces(canvas);
        checkGameOver();
    }

    private void checkGameOver() {
       boolean whiteWin = checkFiveInLine(mWhiteArray);
        boolean blackWin = checkFiveInLine(mBlackArray);

        if(whiteWin || blackWin){
            mIsGameOver = true;
            mIsWhiteWinner = whiteWin ;

            String text = mIsWhiteWinner?"白棋胜利":"黑棋胜利";
            Toast.makeText(getContext(),text,Toast.LENGTH_SHORT).show();
        }
    }

    private boolean checkFiveInLine(List<Point> points) {
        for(Point p : points){
            int x =p.x;
            int y = p.y;
            boolean win = checkHorizontal(x,y,points);
            if(win)return true;
             win = checkVertical(x,y,points);
            if(win)return true;

             win = checkLeftDiagonal(x,y,points);
            if(win)return true;

             win = checkRightDiagonal(x,y,points);
            if(win)return true;


        }
        return false;
    }

    private boolean checkHorizontal(int x, int y, List<Point> points) {
        int count = 1;
        for(int i =1; i < MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x-i , y))){
                count ++ ;
            }else{
                break;
            }
        }
        if (count == MAX_COUNT_IN_LINE) return true;
        for(int i =1; i < MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x+i , y))){
                count ++ ;
            }else{
                break;
            }
        }
        if (count == MAX_COUNT_IN_LINE) return true;
        return false;
    }
    private boolean checkVertical(int x, int y, List<Point> points) {
        int count = 1;
        //上
        for(int i =1; i < MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x , y-i))){
                count ++ ;
            }else{
                break;
            }
        }
        if (count == MAX_COUNT_IN_LINE) return true;
        for(int i =1; i < MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x , y+i))){
                count ++ ;
            }else{
                break;
            }
        }
        if (count == MAX_COUNT_IN_LINE) return true;
        return false;
    }
    private boolean checkLeftDiagonal(int x, int y, List<Point> points) {
        int count = 1;

        for(int i =1; i < MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x - i, y+i))){
                count ++ ;
            }else{
                break;
            }
        }
        if (count == MAX_COUNT_IN_LINE) return true;
        for(int i =1; i < MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x + i , y-i))){
                count ++ ;
            }else{
                break;
            }
        }
        if (count == MAX_COUNT_IN_LINE) return true;
        return false;
    }
    private boolean checkRightDiagonal(int x, int y, List<Point> points) {
        int count = 1;

        for(int i =1; i < MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x-i , y-i))){
                count ++ ;
            }else{
                break;
            }
        }
        if (count == MAX_COUNT_IN_LINE) return true;
        for(int i =1; i < MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x + i , y+i))){
                count ++ ;
            }else{
                break;
            }
        }
        if (count == MAX_COUNT_IN_LINE) return true;
        return false;
    }

    private void drawPieces(Canvas canvas) {
        for(int i = 0  ,n = mWhiteArray.size(); i < n; i++){
             Point whitePoint = mWhiteArray.get(i);
             canvas.drawBitmap(mWhitePiece,
                (whitePoint.x + (1 - ratioPieceOfLineHigh) / 2) * itemSize,
                (whitePoint.y + (1 - ratioPieceOfLineHigh) / 2) * itemSize,null);
    }
        for(int i = 0,n = mBlackArray.size(); i < n; i++){
            Point blackPoint = mBlackArray.get(i);
            canvas.drawBitmap(mBlackPiece,
                    (blackPoint.x + (1 - ratioPieceOfLineHigh) / 2) * itemSize,
                    (blackPoint.y + (1 - ratioPieceOfLineHigh) / 2) * itemSize,null);
        }
}

    private void drawBoard(Canvas canvas) {
        for(int i=0;i<MAX_ITEMS;i++){
            int startX=(int)(itemSize/2);
            int endX=(int)(panelWidth-(itemSize/2));
            int y=(int)((0.5f+i)*itemSize);

            canvas.drawLine(startX,y,endX,y,paint);
            canvas.drawLine(y,startX,y,endX,paint);
        }
    }
    public void restart(){
        mWhiteArray.clear();
        mBlackArray.clear();
        mIsGameOver = false;
        mIsWhiteWinner = false;
        invalidate();
    }

    @Nullable
    private static final  String INSTANCE = "instance";
    private static final String INSTANCE_GAME_OVER = "instance_game_over";
    private static final String INSTANCE_WHITE_ARRAY = "instance_white_array";
    private static final String INSTANCE_BLACK_ARRAY = "instance_black_array";
    @Override
    protected Parcelable onSaveInstanceState() {
        Bundle bundle = new Bundle();
        bundle.putParcelable(INSTANCE,super.onSaveInstanceState());
        bundle.putBoolean(INSTANCE_GAME_OVER,mIsGameOver);
        bundle.putParcelableArrayList(INSTANCE_WHITE_ARRAY,mWhiteArray);
        bundle.putParcelableArrayList(INSTANCE_BLACK_ARRAY,mBlackArray);
        return bundle;
    }

    @Override
    protected void onRestoreInstanceState(Parcelable state) {
        if(state instanceof Bundle){
            Bundle bundle = (Bundle) state;
            mIsGameOver = bundle.getBoolean(INSTANCE_GAME_OVER);
            mWhiteArray = bundle.getParcelableArrayList(INSTANCE_WHITE_ARRAY);
            mBlackArray = bundle.getParcelableArrayList(INSTANCE_BLACK_ARRAY);

            super.onRestoreInstanceState(bundle.getParcelable(INSTANCE));
            return;
        }
        super.onRestoreInstanceState(state);
    }
}
